Function leftButtonDown

external/.scrollLibs.js:10079–10103

(cm, pos, repeat, event)

  }

  function leftButtonDown(cm, pos, repeat, event) {
    if (ie) {
      setTimeout(bind(ensureFocus, cm), 0)
    } else {
      cm.curOp.focus = activeElt()
    }

    var behavior = configureMouse(cm, repeat, event)

    var sel = cm.doc.sel,
      contained
    if (
      cm.options.dragDrop &&
      dragAndDrop &&
      !cm.isReadOnly() &&
      repeat == "single" &&
      (contained = sel.contains(pos)) > -1 &&
      (cmp((contained = sel.ranges[contained]).from(), pos) < 0 || pos.xRel > 0) &&
      (cmp(contained.to(), pos) > 0 || pos.xRel < 0)
    ) {
      leftButtonStartDrag(cm, event, pos, behavior)
    } else {
      leftButtonSelect(cm, event, pos, behavior)
    }
  }

  // Start a text drag. When it ends, see if any dragging actually
  // happen, and treat as a click if it didn't.